(中南工业大学矿物工程系，长沙 410083)
摘 要: 提出了一种新的绘制φ—pH图的方法，即先求出所有的单变线方程，再选取某一种组分Mi为主组分，把含有该组分的所有单变线方程两两求解，求出交点(φi , pHi)，然后用化学势约束原理法，将主组分同其它组分在该点的化学势作比较，若前者的化学势小于后者，则该点为所求的三相点。把生成该三相点的所有组分用数组标记，若任意两个三相点有两种组分相同，便可连成线。
关键字: φ—pH图；三相点；单变线
（Department of Mineral Processing Engineering,
Central South University of Technology, Changsha 410083, P. R. China）
Abstract:A new method of drawing φ—pH diagram has been proposed. Firstly, all of univariant line equations are attained; secondly, a crossing-point (φi, pHi) is got by solving univariant line equations including a main component(Mi) one another; thirdly, φi is compared with the chemical potentials φ of other components in this crossing-point by chemical potentials minimization. If φi<φ, then the crossing-point is the point of three-phase, components in the point of three-phase are labeled in an array; if two components of two points of three-phase are same, then the two points of three-phase are lined safely.
Key words: φ—pH diagram; point of three-phase; univariant line
